| 摘要 |
A cartridge for encasing a disc replaceably, including a cartridge body ( 2 ) having a write/read opening ( 24 ) formed in the bottom thereof, an inner rotor ( 4 ) rotatably received in the cartridge body ( 2 ) and having formed therein an opening ( 44 ) corresponding to the opening ( 24 ), and a pair of shutter members which uncovers the openings ( 24, 44 ) when the inner rotor ( 4 ) rotates until the openings ( 24, 44 ) are aligned with each other.
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